State indicating device of surge protection device

Abstract

The utility model provides a state indicating device of a surge protection device. The state indicating device comprises an upper cover, a base, a piezoresistor assembly, an elastic reed and an indicating device assembly, the piezoresistor assembly is mounted in the base; the end face of the elastic reed is provided with a square through hole which passes through an electrode at the top of the piezoresistor assembly and is welded together by soldering tin; the indicating device assembly is installed at the top end in the upper cover. According to the utility model, the working state of the surge protection device can be effectively judged, and safety and convenience are brought to the use of the surge protection device.

Description

Technical Field

[0001] The utility model relates to a state indicating device for a surge protector, in particular to a device with two state indications of normal working and degradation failure. Background Art

[0002] Surge protector is a commonly used low-voltage protection device. Under normal circumstances, it is in a high impedance state. Once a surge occurs in the line due to lightning strike or other reasons, it will be turned on in a very short time, and the lightning current or overvoltage will be introduced into the earth through the grounding wire to protect the equipment on the line. When the surge protector deteriorates due to various reasons, the varistor in the surge protector will heat up sharply, causing the tripping device in the surge protector to operate, disconnecting the surge protector from the line, preventing the surge protector from "short circuit" and expanding the line accident.

[0003] The surge protectors with similar structures currently on the market only have an indication structure for the failure state of the surge protector, but no indication under normal working state, resulting in unclear state determination. Utility Model Content

[0004] In view of the deficiencies of the above-mentioned prior art, the utility model provides a status indicator device for a surge protector, which is green when observed through a transparent window when the surge protector is in normal working condition, and red when observed through the transparent window after the surge protector deteriorates and fails, so that the current working status of the surge protector can be effectively judged.

[0005] The utility model adopts the following technical scheme: a state indicating device of a surge protector, characterized in that it comprises an upper cover, a base, a varistor assembly, an elastic spring and an indicating device assembly; the varistor assembly is installed inside the base; the end surface of the elastic spring has a square through hole that passes through the electrode on the top of the varistor assembly and is welded together with solder; the indicating device assembly is installed on the inner top end of the upper cover.

[0006] Preferably, the status indicator device for a surge protector is characterized in that: a transparent window is provided on the upper cover, so that the internal working status of the surge protector can be visually observed.

[0007] Preferably, the state indicating device of the surge protector is characterized in that the port setting of the elastic spring is painted red, and can also be painted with other colors that can reflect the failure state of the surge protector, forming a trip failure warning mark.

[0008] Preferably, the status indicating device of a surge protector is characterized in that: the indicating device assembly is provided with a compression spring, an indicating slider, a fixing screw and a fixing bracket; the compression spring is embedded in the hole of the indicating slider and then installed on the slide rail of the fixing bracket to form the indicating device assembly, and finally the indicating device assembly is fixed to the top inner side of the upper cover with a fixing screw.

[0009] Preferably, the status indicator device of a surge protector is characterized in that the indicating slider body is made of a green flame-retardant and high-temperature resistant thermoplastic material, and other colors of materials that can reflect the normal working status of the surge protector can also be used.

[0010] Preferably, the status indicator device of a surge protector is characterized in that: when the surge protector is in normal working condition, the body color of the indicating slider can be visually observed through the transparent window of the upper cover, and the surge protector is in normal working condition at this time; when the surge protector fails and degrades, the elastic spring will bounce up by its own spring force, separating the square through hole on its end face from the electrode on the top of the varistor component, and what can be visually observed through the transparent window of the upper cover is a red mark smeared on the top active surface of the elastic spring after it bounces up, thereby prompting the upper cover indicator window to display a function of changing from green (normal) to red (failure) (other colors that can reflect the degradation and failure state of the surge protector can also be used).

[0011] The beneficial technical effect of the utility model is: a state indicator device for a surge protector, when the surge protector is working normally, it is observed to be green through a transparent window; when the surge protector is degraded due to various reasons, the varistor in the surge protector will heat up sharply, causing the low-temperature solder joint (the point where the top electrode of the varistor component is connected to the elastic spring) to melt, and the elastic spring loses its pulling force and bounces upward, and then hits the indicator device component inside the upper cover, and it is observed to be red through the transparent window. By observing the switching of the two colors inside the transparent window, the working state of the surge protector can be effectively judged, which brings safety and convenience to the use of the surge protector. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the appearance structure of a state indicating device of a surge protector according to an embodiment of the present invention;

[0013] Figure 2 A schematic diagram of an internal indicator device component of a state indicator device of a surge protector according to an embodiment;

[0014] Figure 3 A schematic diagram of the internal and upper cover transparent window status indication of a state indication device of a surge protector in an embodiment under normal working conditions;

[0015] Figure 4 A schematic diagram of the internal and upper cover transparent window status indication of a status indication device of a surge protector under a trip failure condition according to an embodiment;

[0016] In the figure: 1, upper cover; 1a, transparent window; 2, base; 3, varistor assembly; 4, elastic spring; 5, indicating device assembly; 5a, compression spring; 5b, indicating slider; 5c, fixing screw; 5d, fixing bracket. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] like Figure 1 As shown, this embodiment provides a status indicating device of a surge protector, which includes an upper cover 1, a base 2, a varistor assembly 3, an elastic spring 4 and an indicating device assembly 5; the upper cover is provided with a transparent window 1a with three visible windows; the varistor assembly 3 is installed inside the base 2; the elastic spring 4 is welded to the top electrode of the varistor assembly 3; and the indicating device assembly 5 is installed inside the upper cover 1.

[0019] like Figure 2 , is a schematic diagram of an internal indicating device assembly of a status indicating device of a surge protector of the present embodiment; the indicating device assembly 5 is composed of a compression spring 5a, an indicating slider 5b, a fixing screw 5c and a fixing bracket 5d; one end of the compression spring 5a is embedded in the hole of the indicating slider 5b, and the other end is pressed on the stop block of the fixing bracket 5d, and then the indicating slider 5b is installed on the slide rail of the fixing bracket 5d to form the indicating device assembly 5; then the indicating device assembly 5 is fixed to the inner top of the upper cover 1 by two fixing screws 5c.

[0020] like Figure 3 , which is a schematic diagram of the internal state of the state indicating device of a surge protector and the state of the indicating device component 5 under normal working conditions of this embodiment; Figure 3, the varistor assembly is installed inside the base 2; the movable end of the elastic spring 4 is painted red, and the top electrode of the varistor assembly 3 is welded together through the through hole at the corresponding position of the elastic spring 4. At this time, the elastic spring 4 maintains the resilient force of reset; the indicating slider 5b stops just below the transparent window 1a due to the elastic force of the compression spring 5a; the color seen in the transparent window 1a of the upper cover 1 is the main body color of the indicating slider 5b, which can be green or other colors that can reflect the normal working status of the surge protector.

[0021] like Figure 4 , which is a schematic diagram of the internal state of the state indicating device of a surge protector and the state of the indicating device component 5 under the tripping failure condition of this embodiment; Figure 4 When the surge protector deteriorates due to various reasons, the varistor component 3 in the surge protector will heat up rapidly, causing the point where the top electrode of the low-temperature solder joint varistor component 3 is connected to the elastic spring 4 to melt, and the elastic spring 4 loses its pulling force and bounces upward, and then hits the indicating slider 5b above. The indicating slider 5b is pressed by the elastic spring 4 and moves to the right side of the fixed bracket 5d; the movable end of the elastic spring 4 stops directly below the transparent window 1a after resetting; the color seen in the transparent window 1a of the upper cover 1 is the red color painted on the end of the elastic spring 4, and other colors that can reflect the failure state of the surge protector can also be used.

[0022] By observing the current color of the transparent window 1a, the current state of the elastic spring 4 can be determined, and thus the working state of the surge protector can be effectively determined.

[0023] The state indicating device of a surge protector introduced in the above embodiment is a structure in which an internal varistor component 3 of the surge protector has three elastic springs 4 and corresponding three transparent windows 1a. Depending on the current carrying capacity of the surge protector and the use requirements of the internal varistor component, the internal varistor component 3 of the surge protector can be replaced with a structure with one or two elastic springs 4 and corresponding one or two transparent windows 1a.

[0024] In specific use, when the surge protector works normally, it is observed to be green through the transparent window 1a; when the surge protector deteriorates due to various reasons, the varistor in the surge protector will heat up rapidly, causing the low-temperature solder joint (the point where the top electrode of the varistor component 3 is connected to the elastic spring 4) to melt, and the elastic spring 4 loses its pulling force and bounces upward, and then hits the indicator device component 5 inside the upper cover 1. At this time, it is observed to be red through the transparent window 1a. By observing the switching of the two colors inside the transparent window 1a, the working state of the surge protector can be effectively judged, which brings safety and convenience to the use of the surge protector.

[0025] The above description of the disclosed state indicator device for a surge protector enables professionals in the field to implement or use the utility model. Various modifications to these embodiments will be apparent to professionals in the field, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A state indicator device for a surge protector, characterized in that : It comprises an upper cover (1), a base (2), a varistor assembly (3), an elastic spring (4) and an indicator assembly (5); the varistor assembly (3) is installed inside the base (2); the end surface of the elastic spring (4) has a square through hole that passes through the electrode on the top of the varistor assembly (3) and is soldered together; the indicator assembly (5) is installed at the top of the inner part of the upper cover (1).

2. A state indicator device for a surge protector according to claim 1, characterized in that The upper cover (1) is provided with a transparent window (1a) for visually observing the internal working state of the surge protector.

3. The state indicator device of a surge protector according to claim 1, characterized in that: The end of the elastic spring (4) is painted red to form a trip failure warning mark.

4. The state indicator device of a surge protector according to claim 1, characterized in that: The indicating device assembly (5) is provided with a compression spring (5a), an indicating slider (5b), a fixing screw (5c) and a fixing bracket (5d); the compression spring (5a) is embedded in the hole of the indicating slider (5b), and then installed on the slide rail of the fixing bracket (5d), thereby forming the indicating device assembly (5); finally, the indicating device assembly (5) is fixed to the top of the interior of the upper cover (1) by using the fixing screw (5c).

5. A state indicator device for a surge protector according to claim 4, characterized in that: The body of the indicating slider (5b) is made of a green flame-retardant and high-temperature resistant thermoplastic material.

6. The state indicator device of a surge protector according to claim 1, characterized in that: When the surge protector is in a normal working state, the body color of the indicating slider (5b) can be visually observed through the transparent window (1a) of the upper cover (1), and the surge protector is in a normal working state at this time. When the surge protector fails and deteriorates, the elastic spring (4) will bounce up using its own spring force, and separate the square through hole on its end face from the electrode on the top of the varistor component (3). Through the transparent window (1a) of the upper cover (1), the red mark smeared on the top active surface of the elastic spring (4) after it bounces up can be visually observed, thereby causing the upper cover indicator window to display a function of changing from green to red.

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